A Audi 100 (2.2E) car (equipped with V6 electronically controlled engine) is a failure phenomenon when the engine is repaired: the engine can start smoothly when the engine is cooled; the heat engine starts immediately after the fire is extinguished, and it can catch fire smoothly. But after the engine is extinguished and the 0.5h is stopped, it is difficult to start, and the crankshaft must be rotated by the starting machine many times. The engine can catch fire.